> basic reasoning skill
you mean people who haven't done 2 months of leetcode before the interview ?
Amazon interview is one of the easiest to hack with some patience and basic tips and tricks off of leetcode. Def don't need to know "os internals".
Just go to discussion forum on leetocde, tons of ppl who got into amazaon doing this.
Example: https://leetcode.com/discuss/interview-experience/360829/ama...
Don't kid yourself into thinking amazon is seeking some deep CS knowlege when all you have to do is
"Bought a Premium and did whatever company's tag that I will be interviewing with."
Whole thing is quite embarrassing TBH . Funny pppl think grinding leetcode is somehow superior to learning a tech stack .